Machine for cutting and creasing sheet material.



G. N. GOLPITTS.

MAGHINB FOR CUTTING AND GREASING SHEET MATERIAL. APPLICATION FILED DBG. zo, 1910.

Patented NOV. 25, 1913.

4 SHEETS-SHEET 1.

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COLUMBIA PLANDURAPH c0.,wAsHxNuroN. D, c.

C. N. GOLPITTS.

A MACHINE FOR CUTTING AND GREASING SHEET MATERIAL.

APPLICATION FILED DEO. 20, 1910.

v Patented N 0V. 25, 1913.

4 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH C0.,WAsHlNaroN. n. c.

C. N. COLPITTS.

MACHINE FOR CUTTING- AND CREASNG SHEET MATERIAL.

APPLICATION FILED 1320.20, 1910.

1,079,542. Patented Nov. 25, 1913.

l1 SHEETS-SHEET 3.

G. N. GOLPITTS. MACHINE FOR CUTTING AND GREASING SHEET MATERIAL.

\ APPLICATION IILED DEG. 20, 1910. 1,079,542.

Patented, Nov. 25, 1913.

4 SHEETS-SHEET 4,

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MQ 5f 'tiNiTED sTATEs PATENT oEEioE.

CALVIN COLPITTS, 0F BOSTON, MASSACHUSETTS, ASSIGNOR TO AMERICAN SHADE MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MACHINE FOR CUTTING AND CREASING YSVI-IIEIl-LT MATERIAL.`

Specification of Letters Patent.

Patented Nov. 25, 1913.

Application filed December 20, 1910. Serial No. 598,388.

To all whom 2'25 may concern Be it known that l, CALVIN N. CoLPi'r'is, a citizen of the United States, residing at Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Machines for Cutting and Creasing Sheet Material, of which .the following descrip-l tion, in connection with the accompanying drawing, is a specication, like characters on the drawing representing like parts.

This inventionrelates to a machine for cutting and folding sheet material and is in the nature of an impro-vement on the device shown in my Patent N o. 931,996, dated August 24E, 1909. This patent shows a machine adapted to measure off a certain length of sheet material and to sever said length from the body of material, and at the same time to form one or more creases in the material along lines parallel to the severed edge.v The machine of said patent is especially designed for cutting off and creasing lengths of shade material to form window shades, and the creasing of the shade material is for the purpose of facilitating the folding thereof to form the hem at the lower edge of the window shade.

The present improvements relate particularly to the means for cutting and creasing the sheet material and the means for measuring the length which is to be cut oft.

The improvements relative to the creasing of the sheet material have for their object to provide a construction wherein the material may be creased either on the top or the bottom according tothe character of hem which it isdesired to make, and the improvements relating to the measuring kdevice are for the purpose of simplifying the construction and reducing the number of parts.

I will rst describe o-ne embodiment of my invention and then point out the novel features thereof in the appended claims.

Referring now to the drawings wherein I have illustrated a selected embodiment of my invention which is suflicient to disclose the principle thereof, Figure 1 is. a fragmentary view of the side of a machine such as Vshown in my patent, said view sho-wingmy improved cutting, creasing and measuring device in side elevation; Fig. 2 is an enlarged sectional view through the measuring Y, device on the line Fig. 1; Figo?) is a front view of the mechanism shown in Fig. 1; Fig. 4L is an enlarged side view of the cutting and creasing device with a part of the cutting -wheel broken out; Fig. 5 is a top plan view of Fig. 4:; Fig. 6 is a section on the line y, Fig..7 Fig. 7 is a section on the line a--a, Fig. 5; Figs. 8, 9 and 10` show; three dierent styles of hems that are used in the manufacture of window shades; Figs. 11, 12 and 13 show the manner in which the sheet material is creased to form the hems; Fig. 14 shows the arrangement of creasing wheels to form the creases shown in Fig. 12; Fig. 15 shows an arrangement of creasing wheels to formV thercreases shown in Fig.

18; Fig. 16 a diagrammatic view showing lt-he manner in which the cutting .wheel is my Patent No. 931,996. lThis machine com`-, i

prises a framesupporting a table over" "which the sheet material is fed, a Vfeeding druin'sustained by the frame and-adaptedto feed sheet material over thetable, a measuring device which coperates with the means for `rotating the drum to stop the Arotation' of the` drum when the desired length'ofsheet material has been fed oft, and a pocket Aor receptacle into which the severed length of sheet material is rolled up after-the edges thereof have been folded. The table over which the sheet material is drawn bythe feeding drum is provided with a V-shaped track and the knife for severing the lengths of material is mounted on acarriage pro'- vided with creasing wheels which roll over said track and thereby form creases in the material adjacent the severed edge at the saine time that the knife operates to sever thelength of material. Since the present invention, however, relates only to the severing, creasing and measuring devices, I have not deemed it necessary to show in detail the entire machine, but have contented myself with illustrating in Fig. 1 afportion of the frame 3 and a portion of the feeding drum 4 which is rotatably sustained by the frame and which operates to feed kthe sheet material over thecreasing table 5 on which the knife-supporting carriage and creasingl wheels run. The drum 4, a part of which isi'llustra'ted in Fig. 1, may have the same construction and 'operate i-n the same way as 4 Y Associated with vthe creasing table 5 is a shearing member 6formed with a Ashearing edge? which extends from one side of 'the V' 'machinefto the 'other and with-which a ro- Y. ured lengths of material.

tarykni'fe 8. cooperates to'se'ver the mease This knife 8 is sustained byY a carriage "9 adapted to :be moved back and forth*V across the creasing table, all 'as described in Vsaid patent, and during such movement the -knife 8 coperates with the shearing edge 7 to sever the material. The means 'for`V moving the care riage will be presently described.

1n order Yto .provide for creasing the ma- Vteri'ahon eitherY the top or bottom side, the

j' creasingtable j5 is made with ridgesl() and grooves llwhich are parallel to eachother and extend the length of the table fromone sideliof the machine to the other, andthe carriage is provided with two sets of creasing wheels, the creasing wheels of .one set being `in the Y nature of female creasing wheels and 'having grooves in their ,periphlery toiit over the ridgeslO, and the other Y creasing Wheels being inthe nature of .male

creasing wheelsand having a shape at their peripheryv -to fit intothe groovesfll. 1 have herein shown two 'female creasing wheels 12 and -13 vand two vmale creasing wheels 14 and 15. 'i'ellhese'wheels are all ysustained by a Y spindle`16 which is mountedin the carriage 9. and provision is made whereby anyy of the C wheels maybe brought into engagement y with the track, depending whether the materialis to be-creased on the top orV the bottoni' side. There are various ways in which these wheels mightfbe mounted so that the different wheels can'be vbrought intoY operative engagement with the ftrack. The

drawings show one simple construction wherein the male creasing wheels are mounted on eccentric portions of the spindle 16 so that by turning the spindle through 180o -more or less, said wheels maybe brought :into Vengagei'nent with the track and the other wheels lifted `out of engagement.v j This, however, is only -one of several ways in which this end might be accomplished y' without departing from the invention.

As herein shown, the creasing wheels 12 and. 13 are loosely mounted on the spindle 16 concentrically thereof. The creasing wheel 14. is loosely mounted on an eccentric portion 17 of the shaft, which eccentric portion can convenientlyjbe made by securing to the shaft an eccentric collar. The creasing wheel 15 is also eccentrically mounted on the spindle 16by being loosely sustained on an eccentric collar 18. Vhen the spindle is in the position shown in Fig. 7, the creasing wheels` 14 and 15 are elevated above the creasing wheels 12 and 13, while if the shaft is turned through 1800, the creasing wheels 14 and 15 will be depressed below the 'creasing wheels 12 and 13.

The llinife 8 is shown herein as being ldriven from the creasing wheel 12, and for this purposesaid wheel has extending therefrom a pin 19 that enters an aperture 20 formed in the knife, said knife being loosely sustained on the spindle 16 and being acted lon by a suitable spring 21 which tends to hold i't against the shearinoedge 7 This spring is backed by a cozllar 22 loosely mounted on the spindle and resting against a ball bearing 23 which is situated between it andthe iixed collar 24.

1n order to better understand the operation of the creasing wheels 1 will refer now to Figs. 8, 9 and 10, which show different styles of hems that are used in window shades. 1n Fig. 8 is shown a style of hem wherein the main body of the shade 25 is folded back on itself at 26 to form the portion 28, and then is folded again at 27 to form the outer portion 29, said portion 29 being folded at 30 so 'that edge 31 of the material lies between the portions 28 and 29. The hem is finished by sewing `the edges of the fold by two lines of stitching 32, 33. A hem of this type isdesirable caso-called duplex shade material in which the opposite sides are of diiferent colors, for each side of the hem shows the same color as the shade material. In order to make a hem of this construction the sheet material has to be creased as shown in `Fig. 11, that is, it is provided on its upper side with the crease 34 and between this crease and the edge of the material are two other creases 35 and 36 on the under face of the material. After the material has been creased in this way, the portion 81 is folded against the part 29 along the crease 36, and the material -is then folded again along the crease 35 to bring two plies or portions 31, 29 against the portion 28 and the material is then folded again along the crease 34, but in a reverse direction from the other fold, to complete the hem-shown in Fig. 8. To crease the material for forming this hem, therefore, necessitates forming two creases on the under side and one crease on the upper side.

1n Fig. 9 is shown a lsimpler hem of the ordinary type in which the material is merely 'folded back on itself at 37 and `the edge of the material is then folded again at form a hem of this nature it is necessary tol form two creases 35 and 36 only in the under face of the material.

The hem shown in F ig. 10 is similar to'v that shown in Fig. 9 except that it is formed on the upper face of the material andV to crease the material for forming this hem involves the fo-rmation of two creases 39 and 40 on the upper face of the material, as

shown in Fig. 13.

The female wheels rolling over the ridges 10 serve to form the creases 35 and 36 in the under'face of the material, while the male creasing wheels 14 and 15 moving in the grooves 11 serve to form the creases 84, 39 and 40 on the upper face of the material.

In order to form the creases shown in Fig. 11 the parts are Vadjusted as shown in Fig. 7, that is, the female creasing wheels 12 and 13 are arranged to" rest on two of the ridges 10, the creasing wheel`14 is elevated out of contact with the creasing table by proper adjustment of the spindle 16 and the creasing wheel 15 is arranged to engage a special groove 11a formed on the table, which groove is situated at a higher level than the grooves 11.

l/Vhen the length of sheet material has been drawn over the creasing table, the carriage is drawn across said table and during its travel the creasing wheels 12, 13 and 15 will form the creases 36, 35 and 34 in the material, as shown in Fig. 11, and at the same time the knife 8 coperating with the shearing edge 7 `will sever this measured length of material, it being understood that the knife 8 rotates and derives its rotation from the rotary movement of the creasing wheel 12. lf, on the other hand, the material is to be creased in the mannershown 'in Fig.12, then the creasing wheel 15 is'thrown out of operation, and this is done by adjusting said wheel longitudinally of the shaft 16 into the position shown in Fig. 14. Since the groove 112L is at a higher level than the other grooves 11, it will be seen that when the creasing wheel 15 is thus adjusted longitudinally of the spindle, it will not contact with the bottom of the groove 11, but will be spaced therefrom, as shown in Fig. 14. This longitudinal movement of the creasing wheel 15 may be secured in various ways without departing from myinvention. I have herein shown the eccentric collar 18 as splined to the spindle 16 so that it can move longitudinally thereof, but cannot rotate thereon, and the creasing wheel 15 is mounted on the collar so that it can turn freely thereon but cannot move longitudinally thereof. This can be readily accomplished by the Ushaped key 41 which slidesv back and forth in a groove 42 in the spindle and 'work properly,

the arms of which embrace the collar 18 and also a wheel.

To form the creases shown in Fig. 13, the spindle 16 is turned through 18()o thereby depressing the male creasing wheels 14 and 15 relative to the female creasing wheels 12 and 13 so that the weight of the carriage will be supported on the male creasing wheels, while the female creasing wheels are elevated out of contact with the creasing table, all as shown in Fig. 15. When the carriage with the creasing wheels thus adjusted is passed over the creasing table, the material will be creased on the upper side, as shown in Fig. 13.

For turning the spindle 16 l propose to employ the construction shown in F ig. 6 and vwhich comprises a `pin 430 projecting laterally from the spindle and having on its end'a movable locking head 44 that incloses a spring 45. This locking head is provided with a projection 46 shown in dottedlines Fig. 6 that is adapted to enter either one of two notches 47 formed in the carriage 9. Said carriage is provided with the slot 48 in which the pin 430 works. By withdrawing lthe locking head 44 to disengage the projec-V l said arm may be tion 46 from the notch, swung in the slot to turn the spindle from one position to the other as desired.

The creasing wheel 13 may be adjusted longitudinally of the spindle to coperate with any one of the ridges 10 according to the width of hem desired.

For moving the carriage 9, back and forth across the track, I have provided the mecha` nism shown in Figs. 1 and 3 and which comprises a driving wheel 50 supported in a stand 51 carried by the frame 52 and over which runs a sprocket chain 54 that extends to the opposite end of the machine and passes around an idler 53. The ends of the sprocket chain are fastened to the carriage at 55 and 56, respectively, so that by turningrthe driving wheel 50 by means of the handle 57 the `carriage may be drawn back and forth across the track. The frame 53 is provided with a guiding track 58 and the carriage is shown as havingtwo arms 59 and 60 extending therefrom, each of which has a guide roller 61 that runs on the guiding track 58. Suitable springpressed'bulfers 62 at each end of the frame 52 serve to limit the movement of the carriage by engagement with the guide wheels 61. `The arm 60 is preferably made in two sections that are hinged together at 65 and which can be adjusted relative to each other by the adjusting screw 64, the purpose of this construction being to take up any lost motion between the carriage and the tracks on which it runs. Y

ln order that the cutting knife 8 may it is essential that-the adportion of the hub 43of the creasing lvancing or forward edgethereof should all ways beheld against the shearing edge 7 Yand to provide for this I Vhave employed a Vconstruction whereby the pull on the sprocket chain which gives the carriage its y motion will tendto turn the knife angularly Vslightly Vrelative to the shearing edge, so that in whichever Vdirection the carriage moves, a clean cut will be made. The ends .of the sprocket chain 54 are connected to two arms 67 68A that are. secured to an arm 69 of a yoke-shaped -member 7 Oy that is pivoted to the carriage at 71. The arms 72 of this yoke-shaped member` are situated between the cutting knife 8 and the creasing wheels 'andare provided with pins 7 3 which are situated nearly on a horizontal diametrical line. In Fig; 16 I have shown in diagram the way in which thisV construction operates,` although the showing is, of course,

somewhat exaggerated. When the chain is pulling on the arm 6.7 in the direction of the full line arrow Fig. 16, this pull will tend to turn the Yyoke member 70 about its pivot 71 sov as to bring it into the full line position and to force the left-hand pin 73 against the knife 8. The tendency of these forces fis to turngthev knife angularly slightly 'sothat the advancing edge or the righthand edge in Fig. y1,6 is pressed more firmly against the shearing edge 7. When the carriage is moved in the opposite direction, however, or inv the direction of the Adotted line arrow, the parts are swung in the dotted line positionand the tendency of Vthe yoke isl to crowd the knife 8 singularly Y in the opposite direction so thatthe edge Vwhich is at such time the advancing edge `on the carriage and thereby limit the swinging movement ofthe yoke 70.

In the operation of the device the carriage with the cutting knife and creasing wheels will be moved from one end of the track to the other thereby Vto sever and crease one length of'material and while the carriage remains at the end of the track a fresh length of sheet materialV is drawn forward .andV measured` and then the carriage is moved back to its initial 'position thereby severing and creasingI the secondllength of material. With thepresent invention, therefore, one pass of the carriage aerossthe table is suliicient to sever and crease any length ing provided with a slot at its upper of material.

I have shown in Figs. 1, 2 and 17 a measuring device which is well adapted to be used lin connection with my apparatus for measuring and indicating the desired length of shadel material. This measuring device comprises a measuring wheel 83 having a friction treadA Se and adapted to rest on the shade material 25, said wheel operating over a groove 920 in the frame. The wheel 83 is journaled in a frame 85 and has a pinion 86 rigid therewith which meshes with gear teeth 87 on a dial member S8, said member being loosely mounted on a stud 89 and having connected thereto one end of a return spiral spring 90. The dial member 88 has rigid therewith a pinion 94- which meshes with and drives a gear 95 carrying a stop pin 93 adapted to rest against a fixed stop pin 940. The dial member 88 has graduation marks on its face arranged to indicate any desired units of length, such, for insta-nce, as yards or feet. The dia-l is read by means of a fixed indicator or pointer 92. When the shade material is drawn under the wheel 83 the dial willbe rotated and when said dial indicates the proper length the feeding of the shade material will be stopped and the cutting knife will then be operated, as above described, to sever the length and when this severed length has been pulled out from under the measuring device the spring 90 operates to return it to its zero position, as shown in Fig. 1.

79'y and S0 designate guide rolls between which the materia-l is fed to the guiding knife 8. The guide roll 7 9 is sustained in a swinging bracket 81 which is pivoted to the frame at 99 and to which is connected a handle 82 by which the-roll 79 may be swung toward and from the roll 80.

I have provided herein a gripping device togrip the material adjacent the point where the guiding knife operates so-as to prevent the material from drawing back after any length has been severed. This gripping device is in the form of ay gripping ri which extends along the bed of the machine and a swinging gripping member 101 which is pivotallv connected to the swinging bracket 81 and has connected thereto a suspender 98 which is suspended from the frame at 100, said suspender preferably beend to permit a slight vertical movement. The weight of the gripping member 101 resting on the material which passes between it and the gripping member 97 is sufficient to prevent the material from drawing back and the pin-andslot connection between the suspender and the frame permits the gripping member 101 to drag over the rib 97 without binding whenever the bracket 81 is operated.

While l have illustrated one embodiment of my inventiom I do not wish to'be limited tothe c-.onstructional details shown..

Having fully described my invention, what I claim as nevi7 and desire to secure by Letters Patent is l. Ina. machine for cutting and creasing sheet material, the combination with means to feed sheet material, of means to cut Said material transversely to the ldirection of feed, and means to form creases in either side of said material at Will.

2. In a machine for cutting and creasing sheet material, the combination With means to feed sheet material, of means to cut said material transversely to the directionof feed, and means associated with the cutting means to form creases in either side of vsaid material at Will.

3. In a machine of the class described, the combination with means to feed sheet material, of means to form creases transversely of the length of the material in either or both sides thereof at Will. c

el.. In a machine of the class described, the combination with means to feed sheet material, of means to form creases transversely of the length of the material in either side thereof at Will.

In a machine of the class described, the combination With a creasing track over which sheet material may be drawn, of a carriage movable on said track and provided with male and female creasing Wheels, and means to bring either of said Wheels into operative engagement With the track.

6. In a machine of the class described, the combination with a creasing track Vhaving ridges and grooves, of a; female creasing Wheel adapted to roll over one of the ridges thereby to make a crease in the under side of the sheet material, a male creasing Wheel adapted to roll in a groove to form a crease in the upper side thereof and means sustaining said Wheels for adjustment toward and from each other. Y

7. In a machine of the class described, the combination with a creasing track having ridges and grooves, of a female creasing Wheel adapted to roll overthe ridges thereby to make a crease in the under side of the sheet material, a male creasing Wheel adapted to roll in the groove to form a crease in the upper side thereof, and means to place either of said Wheels in operative position.

S. In a machine of the class described, the combination With a creasing track having ridges and grooves, of a plurality of female creasing Wheels adapted toroll over parallel ridges thereby to make creases in the underside of the material, a plurality of male creasing Wheels adapted to roll in the grooves thereby to form creases in the upper side of the material, and means to shift the Wheels into and out of operative position.

9. In a machine of the class described, the combination with a creasing track having ridges and grooves, of a plurality of female creasing Wheels adapted to roll over parallel ridges thereby to make creases in the' underside of. the material, a plurality of male creasing Wheels adapted to roll in the grooves thereby to form creases in the upper side A creasing Wheels adapted to'roll in the grooves thereby to form creases in the upper side of the material, and means to move the female creasing wheels into and out of operative posit-ion and simultaneously move the. male creasing Wheelsout of and into operative position.

ll. In a machine'of the class describedthe combination with a creasing table having ridges and grooves, of means to draw sheet material over the table, a carriage movable on the table in a direction of the grooves, two sets ofcreasing Wheels on the carriage, and means to bring the Wheels ofeither set into engagement With said track.

l2. In a machine of the class described, the combination With! a creasing table having ridges and grooves, of means to draw sheet material over the'table, a carriage `movable on the table in the direction of the grooves, a spindle rotatably sustained by the carriage and provided With an eccentric, a male and a femalecreasing Wheel onsaid spindle, one of said Wheels being mounted on said eccentric portion, and means to turn the spindle to bring either Wheel into engagement With the trac-k.

13. "In a' machine of the class described, the combination with a creasing table having ridges and grooves anda shearing edge, of means to draw sheet material over said table, a carriage movable onthe table in the direction of the grooves, a spindle rotatably sustained by the carriage and provided With an eccentric portion, a male and a female creasing Wheel on the spindle, one of said Wheels being mounted on the eccentric portion, means t-o turn the spindle to bring either Wheel into engagement With the track, and

.a cutter sustained by the spindle and coperating with theI shearing edge.

14. In a machine of the class described, the combination With a table having a shearing edge, and means to feed sheet material over said table, a carriage movable back .and forth across the table, a rotary cutter on said carriage, means to operate the cutter on each pass of the carriage in either direction, and means tending to press the cutter angularly in one direction relative to `the shearing edge as the carriage moves in one direction and to press said cutter angularly in the'other direction relative to the shearing edge Whereby'the carriage moves vin the reverse direction.

15. VIn a machine of the class described, the combination with a table having a shearing edge, of 'a carriage, means to move the carriage back and forth across the table, a

spindlev carried by theV carriage, a rotary cutter mountedv on said spindle, but capable of a slight .angular movement relative to said Qing edge, of acarriage movable across the table, a spindle sustained by said carriage, a rotary cutter having an opening through which said` spindle extends, `said opening being larger than the spindle, means con- "necting the cutter with the spindle ywhereby vso,

rotation ofthe spindle rotates the cutter,

andv means to turn the cutter angularly relative to the spindle as the carriage moves thereby to press the ladvancing edge of the cutter toward the shearing edge.

17. In a machine ofthe class described, the combination with a .table having a shearing edge, of means-to feed sheet'material over said table, a carriage movable across the table, a spindle sustained by the carriage and rotatable as the carriage moves, a rotary cutter flexibly mounted on the spindle but rotatable therewith, carriage-propelling mechanism, and means operated vthereby to kmov-e the cutter relatively to the spindle thereby to press the advancing edge of the cutter toward the shearing edge.

18.. In a machine of the class described, the combination With a table having a shearing edge, of means to feed sheet material .45

Yover Vthe table, a carriage movable across the table, a rotary cutter onfthe carriage, carriage-propelling mechanism adapt-ed to Ymove the `.carriage in either direction, and

means operated thereby to press the advancing edge of the cutter toward the shearing edge during each movement .of the carriage.

19. In a machine of t-he class described, the combination With a table having a shearing edge, of means to feed sheet material over the table, a carriage movable across the table, a rotary cutter mounted on the carriage and cooperating With the shearing edge, a member pivoted to the carriage and adapted to engage the rotary cutter, and carriage-propelling mechanism connected to said pivoted member at a point out of line With its pivotal axis whereby the drag 0f the carriage on the propelling mechanism tends to press the advancing edge of the cutter toward the shearing edge.

20. In a device of the class described, the combination With a table, of means to draw sheet material over said table, a cutter movable across the table to sever a length of sheet material, a gripping rib adjacent the path of movement of the cutter, and a pivoted gripping member loosely resting on said rib to engage the material passing thereover, thereby to prevent it from backward movement.

21. In a machine for cutting and creasing sheet material, the combination With means to feed sheet material, of creasing means for forming creases in said material transversely thereof, and means to adjust said creasing means to form creases on either side of the material.

22. In a machine of the class described, the combination with means to feed sheet material, of crease-forming means including' tWo creasers, one to form creases on each side of the material, and means to render either creaser operative.

23. In a machine of .the class described, the combination With means to feed sheet material, of two creasing Wheels, one to form a crease on each side of the material, and means to place either creasing Wheel in operative position.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

CALVIN N. .COLPITTS Vitnesses:

' LoUIs C. SMITH,

THOMAS J. DRUMMOND.

lQopiesfof this patent may be obtained for ve .cents addressing the (Jmnnissione;l of Patents,

Washington, l). C. 

